[vsnet-grb-info 3769] GRB060923B: Swift/UVOT upper limits

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5603
SUBJECT: GRB060923B: Swift/UVOT upper limits
DATE:    06/09/24 18:05:41 GMT
FROM:    Antonino Cucchiara at PSU  <cucchiara at astro.psu.edu>

S. Holland and A. Cucchiara report on behalf of the
Swift/UVOT team:

The Swift UVOT began observing GRB 060923B (trigger #230702),
M. Stamatikos et al., GCN Circ. 5590) 122 seconds after the
BAT trigger. No optical afterglow is detected in the XRT
refined error circle (M. Capalbi et al., GCN Circ.5602).

The 3-sigma limiting magnitudes for the finding chart and the
coadded images for the UVOT filters are listed below:

Finding chart:

Filter        T_range (s)    Exposure (s)    3sigma UL
White         122-220         98              19.42
White         5163-5360       197             19.79

V             225-387         162             18.52

Coadded images:

Filter        T_range (s)    Exposure (s)    3sigma UL
V             5572-5768       196             18.61
B             4959-5156       197             19.61
U             4754-4950       197             19.28
W1            4550-6170       386             19.45
M2            4345-5974       394             19.70
W2            5368-5565       197             19.92

T_range is calculated from the time of the burst. No correction has
been made for the Galactic reddening of E(B-V) = 0.15 mag
(Schlegel et al. 1998) along the line of sight to the burst.